1# @ohos.app.appstartup.StartupListener 2 3 4The StartupListener module provides APIs to listen for startup tasks. 5 6> **NOTE** 7> 8> The initial APIs of this module are supported since API version 12. Newly added APIs will be marked with a superscript to indicate their earliest API version. 9> 10> The APIs of this module can be used only in the stage model. 11 12## Modules to Import 13 14```ts 15import { StartupListener } from '@kit.AbilityKit'; 16``` 17 18## StartupListener.onCompleted 19 20onCompleted?(error: BusinessError\<void\>): void 21 22Called when all startup tasks are complete. 23 24**System capability**: SystemCapability.Ability.AppStartup 25 26**Parameters** 27 28| Name| Type| Mandatory| Description| 29| -------- | -------- | -------- | -------- | 30| error | [BusinessError](../apis-basic-services-kit/js-apis-base.md#businesserror) | Yes| Error message.| 31 32**Example** 33 34```ts 35import { StartupConfig, StartupConfigEntry, StartupListener } from '@kit.AbilityKit'; 36import { BusinessError } from '@kit.BasicServicesKit'; 37import { hilog } from '@kit.PerformanceAnalysisKit'; 38 39export default class MyStartupConfigEntry extends StartupConfigEntry { 40 onConfig() { 41 hilog.info(0x0000, 'testTag', `onConfig`); 42 let onCompletedCallback = (error: BusinessError<void>) => { 43 hilog.info(0x0000, 'testTag', `onCompletedCallback`); 44 if (error) { 45 hilog.info(0x0000, 'testTag', 'onCompletedCallback: %{public}d, message: %{public}s', error.code, error.message); 46 } else { 47 hilog.info(0x0000, 'testTag', `onCompletedCallback: success.`); 48 } 49 } 50 let startupListener: StartupListener = { 51 'onCompleted': onCompletedCallback 52 } 53 let config: StartupConfig = { 54 'timeoutMs': 10000, 55 'startupListener': startupListener 56 } 57 return config; 58 } 59} 60``` 61